我正在使用ElasticSearch来索引数据，并希望从每天创建的索引中导出一些字段到Google云存储，如何从ElasticSearch索引中的对象数组中获取字段，并使用Logstash将其作为csv文件发送到GCS存储桶
已尝试在配置下从索引中获取嵌套字段：

input {

 elasticsearch {

    hosts => "host:443"

    user => "user"

    ssl => true

    connect_timeout_seconds => 600

    request_timeout_seconds => 600

    password => "pwd"

    ca_file => "ca.crt"

    index => "test"

    query => '

    {
    "_source": ["obj1.Name","obj1.addr","obj1.obj2.location", "Hierarchy.categoryUrl"],

    "query": {

    "match_all": {}

    }

    }

  '

  }

}

filter {
mutate {
    rename => {
        "[obj1][Name]" => "col1"
        "[obj1][addr]" => "col2"
        "[obj1][obj2][location]" => "col3"
        "[Hierarchy][0][categoryUrl]" => "col4"
    }
  }
 }

output {
   google_cloud_storage {
   codec => csv {
    include_headers => true
    columns => [ "col1", "col2","col3"]
   }
     bucket => "bucket"
     json_key_file => "creds.json"
     temp_directory => "/tmp"
     log_file_prefix => "log_gcs"
     max_file_size_kbytes => 1024
     date_pattern => "%Y-%m-%dT%H:00"
     flush_interval_secs => 600
     gzip => false
     uploader_interval_secs => 600
     include_uuid => true
     include_hostname => true
   }
}

如何从对象数组中将字段填充到csv上方，在以下示例中，希望从数组的第一个对象中获取 categoryUrl，并填充到csv表中，然后将其发送到GCS Bucket：

尝试了以下方法：

"_source": ["obj1.Name","obj1.addr","obj1.obj2.location", "Hierarchy.categoryUrl"]

以及

"_source": ["obj1.Name","obj1.addr","obj1.obj2.location", "Hierarchy[0].categoryUrl"]

与

mutate {
    rename => {
        "[obj1][Name]" => "col1"
        "[obj1][addr]" => "col2"
        "[obj1][obj2][location]" => "col3"
        "[Hierarchy][0][categoryUrl]" => "col4"
}

用于输入样本：

"Hierarchy" : [
            {
              "level" : "1",
              "category" : "test",
              "categoryUrl" : "testurl1"
            },
            {
              "level" : "2",
              "category" : "test2",
              "categoryUrl" : "testurl2"
            }}

正在附加示例文档，我尝试在其中获取商品销售层次结构[0].类别URL和定价信息[0].基准价格：

{
        "_index" : "amulya-test",
        "_type" : "_doc",
        "_id" : "ldZPJoYBFi8LOEDK_M2f",
        "_score" : 1.0,
        "_ignored" : [
          "itemDetails.description.keyword"
        ],
        "_source" : {
          "itemDetails" : {
            "compSku" : "202726",
            "compName" : "abc.com",
            "compWebsite" : "abc.com",
            "title" : "Monteray 38.25 in. x 73.375 in. Frameless Hinged Corner Shower Enclosure in Brushed Nickel",
            "description" : "Create the modthroom of your dreams with the clean lines of the VIGO Monteray Frameless Shower Enclosure. Solid 3/8 in. tempered glass combined with stainless steel and solid brass construction makes this enclosure strong and long-lasting. The sleek, reversible, outward-opening door features a convenient towel bar. This versatile enclosure can be installed on a tile floor or with a VIGO Shower Base. With a single water deflector along the bottom seal strip, water is redirected back into the shower to keep your bathroom dry, clean, and pristine.",
            "modelNumber" : "VG6011BNCL40",
            "upc" : "8137756684",
            "hasVariations" : false,
            "productDetailsBulletPoints" : [ ],
            "itemUrls" : {
              "productPageUrl" : "https://.abc.com/p/VIGO-Monteray-38-in-x-73-375-in-Frameless-Hinged-Corner-Shower-Enclosure-in-Brushed-Nickel-VG6011BNCL40/202722616",
              "primaryImageUrl" : "https://images.thdstatic.com/productImages/d77d9e8b-1ea1-4811-a470-8364c8e47402/svn/vigo-shower-enclosures-vg6011bncl40-64_600.jpg",
              "secondaryImageUrls" : [
                "https://images.thdstatic.com/productImages/d77d9e8b-1e1-4811-a470-8364c8e47402/svn/vigo-shower-enclosures-vg6011bncl40-64_1000.jpg",
                "https://images.thdstatic.com/productImages/db539ff9-6df-48c2-897a-18dd1e1794e3/svn/vigo-shower-enclosures-vg6011bncl40-e1_1000.jpg",
                "https://images.thdstatic.com/productImages/47c5090b-49a-46bc-a36d-921ddae5e1ab/svn/vigo-shower-enclosures-vg6011bncl40-40_1000.jpg",
                "https://images.thdstatic.com/productImages/add6691c-a02-466d-9a1a-47200b05685e/svn/vigo-shower-enclosures-vg6011bncl40-a0_1000.jpg",
                "https://images.thdstatic.com/productImages/d638230e-0d9-40c9-be93-7f7bf24f0732/svn/vigo-shower-enclosures-vg6011bncl40-1d_1000.jpg"
              ]
            }
          },
          "merchandisingHierarchy" : [
            {
              "level" : "1",
              "category" : "Home",
              "categoryUrl" : "host/"
            },
            {
              "level" : "2",
              "category" : "Bath",
              "categoryUrl" : "host/b/Bath/N-5yc1vZbzb3"
            },
            {
              "level" : "3",
              "category" : "Showers",
              "categoryUrl" : "host/b/Bath-Showers/N-5yc1vZbzcd"
            },
            {
              "level" : "4",
              "category" : "Shower Doors",
              "categoryUrl" : "host/b/Bath-Showers-Shower-Doors/N-5yc1vZbzcg"
            },
            {
              "level" : "5",
              "category" : "Shower Enclosures",
              "categoryUrl" : "host/b/Bath-Showers-Shower-Doors-Shower-Enclosures/N-5yc1vZcbn2"
            }
          ],
          "reviewsAndRatings" : {
            "pdtReviewCount" : 105
          },
          "additionalAttributes" : {
            "isAddon" : false
          },
          "productSpecifications" : {
            "Warranties" : { },
            "Details" : { },
            "Dimensions" : { }
          },
          "promoDetails" : [
            {
              "promoName" : "Save $150.00 (15%)",
              "promoPrice" : 849.9
            }
          ],
          "locationDetails" : { },
          "storePickupDetails" : {
            "deliveryText" : "Get it by Mon, Feb 20",
            "toEddDate" : "Mon, Feb 20",
            "isBackordered" : false,
            "selectedEddZipcode" : "20147",
            "shipToStoreEnabled" : true,
            "homeDeliveryEnabled" : true,
            "scheduledDeliveryEnabled" : false
          },
          "recommendedProducts" : [ ],
          "pricingInfo" : [
            {
              "type" : "SAS",
              "offerPrice" : 849.9,
              "sellerName" : "abc.com",
              "onClearance" : false,
              "inStock" : true,
              "isBuyBoxWinner" : true,
              "promo" : [
                {
                  "onPromo" : true,
                  "promoName" : "Save $150.00 (15%)",
                  "promoPrice" : 849.9
                }
              ],
              "basePrice" : 999.9,
              "priceVariants" : [
                {
                  "basePrice" : 999.9,
                  "offerPrice" : 849.9
                }
              ],
              "inventoryDetails" : {
                "stockInStore" : false,
                "stockOnline" : true
              }
            }
          ]
        }
      }